Table 3.
Ranks of Adjacent Nucleotide Proportions
| Type | Observed proportion | Proportion bias | ||
|---|---|---|---|---|
| −1 | +1 | −1 | +1 | |
| Substitution | A ≫ C ≈ T ≫ Ga | T ≫ G ≈ A ≫ C | C > A > g > tb | G > T > c > a |
| Transition | A > C ≫ T ≫ G | T > G ≫ A ≫ C | C ≫ A > g > t | G ≫ T > c > a |
| Transversion | A > T ≫ G > C | T > A ≫ C ≈ G | A > G > c ≈ t | T ≈ C ≈ g ≈ a |
| A/G | C ≫ A > T ≫ G | T ≫ A ≈ G > C | C ≫ a > g > t | T > G > c ≫ a |
| C/T | A ≫ C ≈ T > G | G ≫ T > A ≫ C | A > C > g ≫ t | G ≫ t > c > a |
| A/C | A > C ≫ T > G | A ≫ T ≈ C ≫ G | C > A > g ≫ t | A ≈ C ≫ t > g |
| G/T | T ≫ A > G ≫ C | T > G ≫ A > C | G ≈ T ≫ a > c | G ≫ T > c ≫ a |
| A/T | A > T ≫ C > G | T > A ≫ G > C | A > C > t > g | T > G > a > c |
| C/G | A > T ≫ G > C | T > A ≫ C > G | A > G > t > c | T > C ≈ a > g |
a
≫ denotes greater than 5% difference between two nucleotide proportions, > 1%–5% difference, and ≈ less than 1% difference.
b
A lower-case letter denotes a negative bias of the observed nucleotide proportion compared with the genome average.